The notes for this come from Sonic Pi, a system for creating music by writing code. The piece is semi-random: each part chooses a note and note length from a set of predefined notes and lengths. These notes are then routed via MIDI to orchestral and vocal samples. The piece could continue indefinitely and probably wouldn't start repeating itself for quite some time.  

Tagses: ambient,orchestral (we can link these up later)

Link to the mp3 file:
Frozen Lake
Link to this view of the song:
http://songaday.netscrap.com/songs/?scrap_id=4963&scrap_category=44